@Autowired annotation assigning null

Question

applicationProperties variable in NBDropdownValues is assigned "null" even after using @Autowired

Additional details - This application is packaged as war and deployed ontop of Jboss EAP 6.4. Since Jboss comes with restEasy, and I was using Jersey, I had to exclude restEasy modules in jboss-deployment-structure.xml (Note module javaee.api is excluded, but all the dependencies in it are included).

There is no error during deployment and the application gets deployed properly. But when I hit getValues() (http://127.0.0.1:8080/pva-ui-webapp/webapi/nb-dropdownValues), it throws null pointer exception because applicationProperties variable is null.

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns="http://java.sun.com/xml/ns/javaee"
  xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
  version="2.5">
  <display-name>pva-nb-uw-ui</display-name>

  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:/application-context.xml</param-value>
  </context-param>

  <listener>
    <listener-class>
      org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

  <servlet>
    <servlet-name>pva-nb-uw-ui</servlet-name>
    <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
    <init-param>
      <param-name>jersey.config.server.provider.packages</param-name>
      <param-value>com.awpl.resources</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>pva-nb-uw-ui</servlet-name>
    <url-pattern>/webapi/*</url-pattern>
  </servlet-mapping>

</web-app>

application-context.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:context="http://www.springframework.org/schema/context"
  xsi:schemaLocation="
    http://www.springframework.org/schema/context
      http://www.springframework.org/schema/context/spring-context-3.2.xsd
       http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

  <context:annotation-config/>

  <context:property-placeholder location="classpath:/application.properties"/>

  <bean id="applicationProperties" class="com.awpl.beans.ApplicationProperties" scope="prototype">
    <property name="envType" value="${envType}" />
    <property name="mongoClientURI" value="${mongoClientURI}" />
    <property name="language" value="${language}" />
    <property name="mongoDatabaseName" value="${mongoDatabaseName}" />
    <property name="nbDropdownValues" value="${nbDropdownValues}" />
  </bean>

  <bean id="nBDropdownValues" class="com.awpl.resources.NBDropdownValues">
  </bean>

</beans>

NBDropdownValues.java

...

@Path("nb-dropdownValues")
public class NBDropdownValues {

  @Autowired
  private ApplicationProperties applicationProperties;

  public ApplicationProperties getApplicationProperties() {
    return applicationProperties;
  }

  public void setApplicationProperties(ApplicationProperties applicationProperties) {
    this.applicationProperties = applicationProperties;
  }

  Block<Document> printBlock = new Block<Document>() {
    @Override
    public void apply(final Document document) {
      System.out.println(document.toJson());
    }
  };

  JSON json =new JSON();

  @GET
  @Produces(MediaType.APPLICATION_JSON)
  public String getValues() {
    System.out.println("applicationProperties -- "+applicationProperties);
    System.out.println("applicationProperties.getMongoClientURI() -- "+applicationProperties.getMongoClientURI());
    MongoClientURI connectionString = new MongoClientURI(applicationProperties.getMongoClientURI());
    MongoClient mongoClient = new MongoClient(connectionString);
    try {
      MongoDatabase database = mongoClient.getDatabase(applicationProperties.getMongoDatabaseName());
      MongoCollection<Document> collection = database.getCollection(applicationProperties.getNbDropdownValues());

      String serialize = json.serialize(collection.find().sort(Sorts.ascending("order")));
      System.out.println(serialize);
      return serialize;

      //return collection.find().sort(Sorts.ascending("order")).toString();

    } catch (Exception e) {
    } finally {
      mongoClient.close();
    }
    return "Got it!";
  }
}

jboss-deployment-structure.xml

<?xml version="1.0" encoding="UTF-8"?>
<jboss-deployment-structure>
  <deployment>
    <exclude-subsystems>
      <subsystem name="jaxrs" />
    </exclude-subsystems>
    <exclusions>
      <module name="javaee.api" />
      <module name="javax.ws.rs.api" />
      <module name="org.jboss.resteasy.resteasy-jaxrs" />
    </exclusions>
    <dependencies>
        <module name="javax.activation.api" export="true"/>
        <module name="javax.annotation.api" export="true"/>
        <module name="javax.ejb.api" export="true"/>
        <module name="javax.el.api" export="true"/>
        <module name="javax.enterprise.api" export="true"/>
        <module name="javax.enterprise.deploy.api" export="true"/>
        <module name="javax.inject.api" export="true"/>
        <module name="javax.interceptor.api" export="true"/>
        <module name="javax.jms.api" export="true"/>
        <module name="javax.jws.api" export="true"/>
        <module name="javax.mail.api" export="true"/>
        <module name="javax.management.j2ee.api" export="true"/>
        <module name="javax.persistence.api" export="true"/>
        <module name="javax.resource.api" export="true"/>
        <module name="javax.rmi.api" export="true"/>
        <module name="javax.security.auth.message.api" export="true"/>
        <module name="javax.security.jacc.api" export="true"/>
        <module name="javax.servlet.api" export="true"/>
        <module name="javax.servlet.jsp.api" export="true"/>
        <module name="javax.transaction.api" export="true"/>
        <module name="javax.validation.api" export="true"/>
        <!-- <module name="javax.ws.rs.api" export="true"  services="export"/> -->
        <module name="javax.xml.bind.api" export="true"/>
        <module name="javax.xml.registry.api" export="true"/>
        <module name="javax.xml.soap.api" export="true"/>
        <module name="javax.xml.ws.api" export="true"/>
        <!-- This one always goes last. -->
        <module name="javax.api" export="true"/>
    </dependencies>
  </deployment>
</jboss-deployment-structure>

pom.xml

...
  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.glassfish.jersey</groupId>
        <artifactId>jersey-bom</artifactId>
        <version>2.26</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>

  <dependencies>

    <dependency>
      <groupId>org.glassfish.jersey.containers</groupId>
      <artifactId>jersey-container-servlet-core</artifactId>
      <!-- use the following artifactId if you don't need servlet 2.x compatibility -->
      <!-- artifactId>jersey-container-servlet</artifactId -->
    </dependency>

    <dependency>
      <groupId>org.glassfish.jersey.inject</groupId>
      <artifactId>jersey-hk2</artifactId>
    </dependency>
    <!-- uncomment this to get JSON support <dependency> <groupId>org.glassfish.jersey.media</groupId> 
      <artifactId>jersey-media-json-binding</artifactId> </dependency> -->

    <!-- spring support -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>4.1.9.RELEASE</version>
    </dependency>

    <!-- mongo drivers -->
    <dependency>
      <groupId>org.mongodb</groupId>
      <artifactId>mongodb-driver</artifactId>
      <version>3.5.0</version>
    </dependency>
...

Your `@Autowired` is applied to an object that isn't a Spring bean. You need the Spring-Jersey integration. — chrylis -cautiouslyoptimistic-, Nov 27 '17 at 03:52
i have defined applicationProperties as a bean in application-context.xml. Is this not enough? — Nithin Kumar Biliya, Nov 27 '17 at 03:55
See https://stackoverflow.com/questions/19896870/why-is-my-spring-autowired-field-null — chrylis -cautiouslyoptimistic-, Nov 27 '17 at 04:00
i have edited my question to include the dependency list in my pom.xml. There is no Spring-Jersey in it — Nithin Kumar Biliya, Nov 27 '17 at 04:26

@Autowired annotation assigning null

0 Answers0